While I didn't have much trouble getting my credit cards into the Coin, I've had a hard time using it. It fails over 50% of the time, and won't work on any of my cards that have chips and that's becoming the norm for credit card companies. I ordered two, but only received one, and it took multiple emails to get the other one (intended for my spouse). A good concept, but poor execution.
Bottom Line: No, I would not recommend this to a friend